<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2900.2180" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>Have had a lot of people asking about
"roaming"capabilities of current SIP Based WIFI phones. Here's a
clarification using the UTStarCom F1000 as an example.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV>Roaming is an ill defined term. To tell you what the phones
do:<BR><BR>We would define "ROAMING" in the context of multiple locations.
An F1000 will "roam" from AP to AP with no problems. If it goes out of
range of an AP, it will scan for another one in its profiles. <BR><BR>The other
item often confused with roaming is hand over. In that case, the phone
will move from AP to AP even while on a call and will maintain the call.
The F1000 will do that if all APs are served from the same access controller and
are on the same subnet. This will not work if an area is covered by
multiple AP/Routers (like the Linksys WRT54G's) where each router has a
different DHCP server to allocate addresses on its subnet. The whole
DHCP/Registration process takes far too long to manage a hand over.<BR><BR><FONT
face=Arial size=2>Cory Andrews<BR>++++++++++++++++++<BR>VOIPSupply.com<BR>A
Division of b2 Technologies<BR>454 Sonwil Drive<BR>Buffalo, NY
14225<BR>++++++++++++++++++++<BR>direct - 716.250.3402<BR>mobile -
716.907.4054<BR>email - <A
href="mailto:Cory@VOIPSupply.com">Cory@VOIPSupply.com</A><BR>AIM -
b2Cory<BR></FONT></DIV></BODY></HTML>